package com.ljtg.ljtgservice.aspect;


import com.ljtg.constant.AutoFillConstant;
import com.ljtg.context.BaseContext;
import com.ljtg.enumeration.OperationType;
import com.ljtg.ljtgservice.annotation.AutoFill;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    @Pointcut("execution(* com.ljtg.ljtgservice.mapper.*.*(..)) && @annotation(com.ljtg.ljtgservice.annotation.AutoFill)")
    public void autoFillPointCut(){}

    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinpoint) throws NoSuchMethodException {
        log.info("开始进行公共字段自动填充...");

        MethodSignature signature=(MethodSignature) joinpoint.getSignature();
        AutoFill autoFill=signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType=autoFill.value();

        Object[] args=joinpoint.getArgs();
        if(args==null||args.length==0){
            return;
        }

        Object entity=args[0];

        LocalDateTime now=LocalDateTime.now();
        Long currentId= BaseContext.getCurrentId();

        if (operationType==OperationType.INSERT){
           try {
               Method setCreateTime= entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME,LocalDateTime.class);
               Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
               Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
               Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

               setCreateTime.invoke(entity,now);
               setCreateUser.invoke(entity,currentId);
               setUpdateTime.invoke(entity,now);
               setUpdateUser.invoke(entity,currentId);
           }catch (Exception e){
               e.printStackTrace();
           }

        }else if (operationType ==OperationType.UPDATE){
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            }catch (Exception e){
                e.printStackTrace();
            }
        }
    }
}
